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Who does not love a good computer operating system? I know I do – every day.

As the classic Mac OS grew in to an ever growing tangle of code it was decided to find a replacement and start again. Several options were available and a likely contender was the Be system but ultimately Apple decided to buy NeXTSTEP which had been created by NeXT the company that Steve Jobs had started after leaving Apple – effectively bring Jobs back to Apple. NeXTSTEP was reworked in to a new version of Mac OS. As it would be the tenth version, was based on a UNIX system and was a departure from the last version Mac OS 9 it was called Mac OS X rather but still pronounced 10. The name was later shortened to just OS X. It is now expected to revert back to Mac OS so as to fit in with iOS, tvOS and watchOS.